Hoisting apparatus.



PATENTED MAY 14, 1907.

I I. s. WALKER. I

H-OISTING APPARATUS.

APPLICATION FILED JULY 14. 1900.

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UNITED STATES PATENT OFFICE.

HOISTING APPARATUS.

Specification of Letters Patent.

Patented May 14, 1907.

Application filed July 14. 1906. Serial irofszazso.

ers skilledin the art to which it appertains .to

make and use the same, reference being had to the accompanying drawings,and to the letters and figures of reference marked thereon, which form apart of this specification.

This invention relates to new and useful improvements in hoistingapparatus, and the ob]ect of the invention is to produce a simple andefiicient means whereby heavy articles, such as metallic bath-tubs, etc,may be hoisted and turned over conveniently and lowered right side up.

The invention consists further in various details of construction andcombinations and arrangements of parts which will be herein'after fullydescribed and then specifically defined in the appended claims.

I illustrate my invention in the acoornpanying drawings, in which Figure1 is a side elevation of my invention. Fig. 2 is a front elevation, andFig. 3 is a sectional view on line 33 of Fig. 2.

l Reference now being had to the details of the drawings by letter, Adesignates a grooved track, and B, B, designate standards, each of whichis hollow and rovided with longitudinal guideways in w 'ch the bearingblocks D have vertical play. The upper end of each standard is flaring,as at B, and works in a groove in an inverted track B A' projection D ofeach bearing block works in an elongated slot B in each standard. Edesignates a shaft, preferably square in cross section, and the spindleends of said shaft are journaled in said bearing blocks. F, F designatechains, each being secured to one of said blocks and passing over asheave G journaled at the upper end of Y the standard, thence passingover a drum H journaled in brackets I near the lower ends of saidstandards, and. crank arms are fixed to the spindle ends of the shaftsupon which said drums are mounted, whereby the chains may be wound uponor unwound from the drums, and dogs J are pivotallymounted upon saidbrackets and adapted to engage the teeth of ratchet wheels rotating withthe and O designates a threaded shaft passing through registeringapertures in corresponding ends of said platesand nuts 0 are mounted onthe ends of said shaft and are adapted to bear against the outer facesof semi plates, whereby the same may beheld in clamping relation againstan object, such as a bath tub, designated in the drawings by letter Saidplates are forked, as shown clearly in the side view of the drawings,and in each arm R of the forked end of the plates are formed theperforations Q through which the threaded rods S are adapted to passcrosswise of the tub, and upon which the tub or other object beinghoisted is adaptedto rest when inverted. Nuts T are fitted upon thethreaded ends of the rods S and are adapted to hold said arms againstthe sides of the object being hoisted.

In order to hold the bearing blocks at any desired elevations, pins Ware passed through the registering perforations O of the standardsunderneath the blocks, and pins L are also passed through the shaft Eand adapted to bear against the outer faces of the plates for thepurpose of holding the same in adjusted positions upon the shaft.

From the foregoing, it will be noted that by the provision of theapparatus shown and described, a simple and eflicient means is affordedfor hoisting heavy weights, such as bath-tubs, etc., and allowing thesame to be swung about and lowered right side up or vice versa.

What I claim is 1. A hoisting apparatus comprising standards, wheelsjournaled at the bottoms of said standards, vertically movable bearingblocks mounted one upon each standard, a shaft journaled in said blocks,plates held upon said shaft, and means for clamping the object to behoisted intermediate said plates, as set forth.

2. A hoisting apparatus comprising standards, wheels journaled at thebottoms of said standards, vertically movable bearing blocks mounted oneupon each standard, a shaft i'ournaled in said blocks, plates havinganguar-outlined apertures adapted to receive said shaft and turntherewith, threaded rods passing through registering apertures in saidplates, and nuts mounted upon the threaded portions of said rods andadapted to bear IOO IIO

against the outer faces of the plates, whereby the latter may be heldagainst the sides of the object being hoisted, said rods at one end ofthe plates serving to support the object being raised, as set forth.

3. A hoisting apparatus comprising standards, wheels journaled at thebottoms of said. standards, vertically movable bearing blocks mountedone upon each standard, a shaft {ournaled in said blocks, plates havinganguar-outlined apertures to receive said shaft upon which they aremounted, pins passing through the shaft and adapted to hold the platesadjacent to an object intermediate the same to be hoisted, threaded rodspassing through arms of the plates and upon which thevobject beingraised is adapted to rest, nuts upon said rods, means for holding thebearing blocks elevated, hoisting chains con- 20 nected to said blocksand passing over suitable sheaves, and drums upon which the chains areadapted to wind, as set forth.

4-. In combination with the standards, wheels journaled at the lowerends thereof, a grooved track in which said Wheels travel, an invertedgrooved track at the upper ends of the standards, flaring blocks at theupper ends of said standards and adapted to travel in said invertedtrack, bearing blocks carried in grooved ways in said standards, a shaftj ournaled in said blocks, plates mounted upon said shaft and adapted tobe clamped against the object to be raised, and means for raising and.lowering said blocks, as set forth.

In testimony whereof I hereunto affix my signature in the resence of twowitnesses.

J OH SPENCER WALKER. Witnesses:

HARRY J GRATTON, CHESTER A. POWER.

